Glass pane gluing station - GVM 114

Manual gluing

The glass pane gluing station GVM114 has been designed as the entry into the manufacture of glued elements and optimized for the application of two-component adhesives. To meet the customer’s manufacturing requirements the gluing station is capable of gluing sashes or complete window structures made of plastics, aluminium or wood. The gluing nozzle is manually guided so that the adhesive can be applied into the glazing rebate or the casement overlap.

Although the manual gluing station is mainly used as an entry into gluing, its parts can nevertheless be reused later on in an automatic gluing system. Thus the pumping equipment, the LEMUTH DynaFlow metering station, the industrial PC and the supply hoses can be reused in a fully automatic version of a gluing machine.

Boom to carry the adhesive hoses

The hose can be easily guided throughout the entire working area by a cantilever arm attached to the boom.

LEMUTH DynaFlow

The specially designed LEMUTH DynaFlow metering station is the main part of the gluing station. Like the industrial PC, the metering station is mounted on a base frame. The adhesive delivered by pumps is transported by the barrel pumps to the metering station, where the pressure of the adhesive is reduced by pressure reducers and where afterwards the optimum mixing ratio of both components is adjusted by gear pumps that are driven by servomotors. By reducing the pressure of the adhesive upstream of the gear pumps, the operation of the gear pumps is almost wear-free. Both components are then transported in an optimum ratio to the application nozzle where they are mixed.

Sturdy base frame

to carry all parts of the gluing station.

Application gun

An application gun fitted to the hose ends is used for mixing the two-component adhesives. The two substances are mixed by a replaceable one-way PVC mixer.

The control

A Beckhoff industrial PC is used for the control of the metering station. This PC controls all parameters of adhesive metering and can also be used as a monitoring unit. All process-relevant parameters are monitored and recorded. This allows all parameters of a glued element to be checked later and at any time. The control is programmed with Windows XP. Remote maintenance of the systems is possible via the Internet.

Semi-automatic glass pane gluing machine - GVH 112

Gluing into the glazing rebate or casement overlap – combined in one system

The semi-automatic glass pane gluing machine from the GVH112 series provides an optimal, inexpensive way to introduce the production of glued elements. Depending on the customer’s production requirements, the system glues elements made of plastic, aluminium or wood into the glazing rebate or casement overlap.

Gluing into the glazing rebate / rebate base

When gluing into the glazing rebate, the glass pane is inserted into the sash before applying the glue. The glue is spread into the area between the glass laminate and the glazing rebate / rebate base. However, profiles that will be processed later need to be constructed accordingly. That means that the gap between the glass pane and the glazing rebate base is reduced by 3 – 4 mm to minimize the amount of glue. It’s possible to reduce this gap because this gluing concept doesn’t require the insertion of pads.

Gluing into the casement overlap

With this process, the glue is applied into the casement overlap either on the inside or the outside. The glass pane is inserted after the glue has been applied.

Applying the glue

The element that is to be glued is pushed manually into the processing position and is then automatically clamped in place. The operator starts the procedure, and the glue application for the first side of the element begins. After the application on the first side is completed, the operator manually turns the element over to the second side and pushes it into the processing position.The glue application for the second side then takes place automatically. After this procedure has been followed for all 4 sides, further processing –such as adding glazing beads – can take place.

Machine control

The most important data are displayed on a two-line readout where they can be monitored and optimized. It is not required to make data accessible.

Gluing affords greater stability

Gluing technology delivers a much higher level of stability. The number of subsidences or deformations is noticeably reduced. The gluing of PVC sashes in glazing rebates of up to 2 m also dispenses with the need for steel reinforcements. It is also possible to narrow the profile of the sash itself resulting in an additional savings on materials. The sash is lighter. The greater rigidity of the unit facilitates the production of larger sashes.

Extremely narrow sashes

The gluing on the casement overlap is based on a window where the casement no longer has a glazing bead. This allows for extremely narrow sashes, since the glass more or less holds the profile. Normal insulated panes are used in this process, not multi-layered insulated panes.

Outstanding heat insulation

The glued sashes are absolutely windproof. Elements with standard glazing improve the insulation value by 20%. Windows with such good characteristics are optimal for use in passive and low-energy houses.

Advantages of gluing panes

No pad insertion necessary

Mechanical pre-priming only necessary for sashes

Slender appearance (more light in the living space)

About 20% better insulation in profile cross section

Improved sound insulation (the glue acts as an absorber)

Better security and protection against break-ins due to improved connection between glass and sash

Automatic glass pane gluing machine - GVA 115

Precision gluing of panes into sashes

LEMUTH’s glass gluing machine guarantees the accurate and neat gluing of panes into the sashes. The machine needs 60 to 65 seconds to apply the glue to a standard surface area of 1 m x 1.2 m. The composition of the profile to be processed must be adapted accordingly, meaning, the slot between the glass pane and the rebate base of the sash will be reduced to 3 – 4 mm to minimise the amount of glue required. A reduction of the slot is possible since this gluing method does not require using wedges for the glass pane.

Fully automated processing

After the operator has inserted the pane of glass into the sash of the fully assembled window frame on the preceding loading rack, the machine takes the window for further work. Individually driven conveyor belts on the lower and the back side of the machine ensure that the unit is transported gently. Before gluing, the window unit is automatically clamped to the rear panel of the machine. The glue is inserted around the entire periphery between the glass compound and the glazing rebate. After application the window units are loaded off the machine. The glazing beads are then assembled. Shortly afterwards it is possible to gently feed the window unit onwards.

High-tech down to the very last detail

Via an automatic plausibility check the machine controls the exact thickness of the glass. Further-more, when using hot melt adhesives, a specific mechanism has been integrated for the alignment of the glue stream. This ensures that the injection nozzle always glides at the optimum injection angle to the profile section. The heated glue nozzle stand-by position prevents the glue from hardening during periods of inactivity. When using silicones or 2-component polyurethanes the nozzle is equipped with a compensating element to balance out any deviations in the profile section. The nozzle glides along the surface of the glass.

Gluing of numerous user-defined panels

The machine can process windows with any number of sashes. After the parts have been recognised using a barcode reader the control system processes all the necessary information from the data record for the machining of the parts.

Windows-PC and fast remote-access

A convenient industry PC with windows-XP is available for data input. For fast remote-access there is an integrated modem.

Gluing affords greater stability

Gluing technology delivers a much higher level of stability. The number of subsidences or deformations is noticeably reduced. The gluing of PVC sashes in glazing rebates of up to 2 m also dispenses with the need for steel reinforcements. It is also possible to narrow the profile of the sash itself resulting in an additional savings on materials. The sash is lighter. The greater rigidity of the unit facilitates the production of larger sashes.

Outstanding Thermal Insulation

The glued sashes are completely wind proof. Ele-ments with standard glazing improve the insulation value by 20%. Windows with such good characteristics are optimal for use in passive and low-energy houses.

Advantages of gluing panes

No pad insertion necessary

Mechanical pre-priming only necessary for sashes

Slender appearance (more light in the living space)

About 20% better insulation in profile cross section

Improved sound insulation (the glue acts as an absorber)

Better security and protection against break-ins due to improved connection between glass and sash

Glass pane units can be replaced at any time

VERTICAL machining position - optimised for gluing in the sash rebate

When the glue is applied in the sash rebate, it is applied between the glass pane edge bond and the sash profile. A gap of approximately 3 mm is required for this application. For the gluing of the glass pane, the sash can already be mounted in the frame. The advantage of this is that the sash can be optimally aligned in the frame. Thanks to the increased rigidity of the sash after gluing, the sash and the frame form a perfect unit.

HORIZONTAL machining position - optimised for gluing in the sash overlap

In this configuration, the glue is usually applied to the inside or the outside of the sash overlap. High-precision handling units fully automatically perform all work processes such as loading the sash, applying the glue and inserting the glass in a precise manner. Because it is mainly wooden sashes that are glued in the overlap, the sash can be aligned precisely at right angles by means of the clamping table. Once the glue has set, the aligned sash will retain its shape permanently.

Adhesive metering and applying system - DynaFlow

This highly dynamic machine system has been designed for metering and applying one- and two-component adhesive types for the automatic adhesive application to window and door units. The adhesive can be deposited in the glazing rebate or in the casement overlap. All control and automatic regulation functions of this application system are carried out directly by the control system of the automatic gluing machine.

The application system consists of the following main elements and functions:

The adhesive components are metered by commercial gear pumps that are driven by servo motors.

The control of the servo motors for the dynamic regulation of the amount of adhesive is carried out directly by the control system of the automatic gluing machine. Thus it is possible to exactly meter the required amounts of adhesive and the mixing ratio even in the start and stop ramps of the travelling motion of the automatic machine.

The I/O pressure of the gear pump is always kept at the same level by means of pressure measuring sensors installed at the input and output of the gear pump and an upstream automatic regulation of the input pressure of the gear pump.

The adhesive injection nozzle is floating, and when taking the inner corner it is rotated by a servo motor exactly at the travelling speed.

When two-component adhesives are applied an additional parallel metering valve, which is located upstream of the static mixer, is used to flush the mixer with the A component.

The measuring devices installed in parallel with the adhesive injection nozzle check the glass thickness and the correct position of the glass pane in the window unit.

The static mixer which is located in a protecting metal tube can be easily and fast changed by means of a quick-disconnect coupling.

Rotating brushing devices clean the nozzle of the static mixer after every gluing cycle.